Great subject! I started noticing tinnitus several years ago. I went to have my hearing evaluated, and found that I struggled to hear high frequency tones above 8 kHz. I was bummed. But then I sort of “self-evaluated” my music listening, by listening to familiar music from the past that I used as demo material 30-40 years ago, to try to identify what might be different/missing. I can absolutely still pick out areas of the songs that were points I’d evaluate for sound quality, but I also noticed certain high frequency notes in some songs were “missing”, or just lower in level relative to the rest of the sounds. Last year I upgraded from Magnepan 1.7i to 3.7 speakers, which I had been putting off, thinking that the addition of the ribbon tweeter would be lost on me. That turned out to be false. I can hear and appreciate the improvement that ribbon makes in the sound presentation. How? I have no idea, but I’m glad I went for it! I’ve also been evaluating some amplifiers, to choose the best fit for my speakers/room/preferences. I can CLEARLY hear the differences between these amplifiers in my system. I’ve done phono cartridge comparisons in the last few years, and I had no problem sorting out the sounds of those. I’m in the process of working to improve what I use for streaming, and I can hear differences in quality between the music services I’m trying. I just started a Qobuz subscription to try that as well. My point is that even with the knowledge that my hearing is in decline, I can still evaluate differences in quality, and I still enjoy good sound from my system.